Changing of name on electricity bill

My name is XXX more and I have 4 sisters all are married and this year my dad expired so the property has been transferred to me as per mutual consent of all 4 sisters. After that I had made release deed that is the noc of all 4 sisters. My question is that I am applying the change of name online on Adani electricity portal and they are asking to upload this below three optional documents. 1 out of 3 documents. 1. affidavit swearing succession cum NOC from otherr legal heir 2. probate of will 3. succession certificate. So I am not understanding what to upload. Plzz help me in this Kindly advice how to change name in electricity bill after father's death?